PARTS CATALOGUE /TECHNICAL GUIDE Cal. 7T62A/7T92A/7T94A [SPECIFICATIONS] Cal. No. 7T62A Item 7T94A 7T92A Movement (x 1.0) The illustrations refer to Cal. 7T62A. Movement Outside diameter size Casing diameter Time indication Ø 27.6 mm Ø 27.0 mm Height 3.3 mm Main time Hour, minute and small second hands Stopwatch Minute hand 1/5-second hand (moves at 0.2-second intervals) Alarm Driving system Minute hand 1/5-second hand (moves at 0.2-second intervals) Hour and minute hands (Minute hand moves at 1-minute intervals.) Step motor (Load compensated driving pulse type) 4 pcs. Additional mechanism Hour and minute hands Second hand 1/20-second hand (moves at 0.05-second intervals) 3 pcs. 4 pcs. • Electronic circuit reset switch • Train wheel setting device • Date calendar • Instant setting device for date calendar • Battery life indicator • Stopwatch function • Measures up to 60 minutes in 1/5-second increments. • Accumulated elapsed time measurement • Split time measurement • Stopwatch function • Measures up to 12 hours in 1/20-second increments. • Accumulated elapsed time measurement • Split time measurement • Stopwatch function • Measures up to 60 minutes in 1/5-second increments. • Accumulated elapsed time measurement • Split time measurement • Single-time alarm function Loss/gain Monthly rate at normal temperature range: less than 15 seconds Regulation system Nil Measuring gate by quartz tester Use 10-second gate. Battery Battery No. SEIKO SR927W, SONY SR927W, Maxell SR927W, Matsushita SR927W Voltage 1.55 V Battery life Approx. 3 years Jewels Nil SEIKO SR927SW, SONY SR927SW, Maxell SR927SW, Matsushita SR927SW Approx. 3 years Approx. 5 years REMARKS ON REPAIRING CAL. 7T62A/7T92A/7T94A Unlike the other Cal. 7T Series watches, which have two crowns and three buttons, Cal. 7T62A, Cal. 7T92A and Cal. 7T94A have one crown and two buttons. But their basic movement structure is similar in other respects, and the knowledge and technique you have gained in handling the previous Cal. 7T Series watches will come in handy when you repair Cal. 7T62A, 7T92A as well as 7T94A. When repairing, however, you are requested to have the full knowledge of the features characteristic of these watches and strictly observe the repairing and checking instructions provided in this guide so that the watches will be repaired correctly. FEATURES As Cal. 7T62A/7T92A/7T94A has fewer crowns and buttons, the operating procedures for alarm setting (for Cal. 7T62A only), time setting and stopwatch hand position adjustment differ from those of the other Cal. 7T Series watches. As a result of this structure change, the battery life of Cal. 7T62A/7T92A/7T94A has increased as compared with that of the other Cal. 7T series watches. Button “A” Crown 5 Button “A” Button “A” Crown Crown 5 Button “B” Button “B” CAL. 7T62A Button “B” CAL. 7T92A CAL. 7T94A 1. STOPWATCH FUNTION ● Measurement performance Cal. 7T62A and 7T94A: Measures up to 60 minutes in 1/5 second increments. Displays the elapsed time with the stopwatch minute and 1/5-second hands. Cal. 7T92A: Measures up to 12 hours in 1/20 second increments. Displays the elapsed time with the stopwatch hour, minute, second and 1/5-second hands. ● Button operation Standard Measurement A A Start B Stop Reset Accumulated Elapsed Time Measurement A Start A A Restart Stop A Stop B Reset B Reset B Reset Split Time Measurement A Start B B Split Split release A Stop Measurement of Two Competitors A Start B Finish time of 1st competitor A 2nd competitor finishes B Finish time of 2nd competitor 2. ALARM FUNCTION (For Cal. 7T62A only) • The alarm sounds only once at a designated time within the coming 12 hours and it is automatically disengaged. • Pushing the crown back into the normal position after setting the alarm will prevent the set alarm time from changing by an accidenal pressing of the button. A CROWN Pull out to the A 1st click. B Press to set the alarm time. 2/27 CROWN Push back in to the normal position. Cal. 7T62A/7T92A/7T94A PARTS CATALOGUE Disassembling procedures Figs. : 1 55 Reassembling procedures Figs. : 55 1 Lubricating: Types of oil AO-3 (or MS-A) Oil quantity AO-2 (or MS-F) Normal quantity Liberal quantity SEIKO Watch Oil S-6 The illustration refers to Cal. 7T62A, 7T92A and 7T94A. 1 0027 973 Pin for date dial guard 2 0808 580 Date dial guard 3 (0878 527) ★ Date dial ★The type of the part pages 10&13 page 10 is determined based on the case design. 4 0962 580 Intermediate wheel for calendar correction 5 0737 580 Date corrector setting wheel 6 0802 580 Date driving wheel 7 0271 583 Hour wheel for alarm 8 0271 588 Hour wheel Remarks on removing the winding stem To remove the winding stem when taking out the movement from the case or while disassembling the parts during repair work, be sure to pull out the crown to the first click, and then, remove the winding stem while pushing the setting lever. page 14 Please see the remarks on the following pages. Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING.” 3/27 Cal. 7T62A/7T92A/7T94A PARTS CATALOGUE The illustration refers only to Cal. 7T62A. 9 0022 230 Battery clamp screw 0022 230 • Battery clamp screw (2 pcs.) 0022 459 10 4225 511 Battery clamp page 14 11 SR927W Battery page 1 • Circuit block cover screw (4 pcs.) 12 0022 459 Circuit block cover screw (4589 801) Piezoelectric element 13 4457 814 Circuit block cover page 15 page 15 14 0396 580 Friction spring for second counting Case back 15 4000 517 Circuit block pages 10,11&16 16 4246 700 Buzzer lead terminal 17 4270 710 Battery connection (–) pages 10&17 18 0027 974 Pin for train wheel bridge 21 0240 580 Small second wheel page 19 24 0701 580 Fifth wheel & pinion page 19 25 0885 590 First intermediate wheel for second counting page 19 page 19 26 0885 591 Second intermediate wheel for second counting 28 0950 590 Intermediate minute counting wheel page 19 29 0902 580 Minute counting wheel page 19 19 0125 586 Train wheel bridge page 17 20 0888 582 Second counting wheel page 19 22 0241 583 Fourth wheel & pinion page 19 23 0231 580 Third wheel & pinion page 19 27 0261 580 Minute wheel page 19 page 19 30 0950 590 Intermediate alarm wheel 31 0270 582 Center wheel for alarm page 19 32 0261 582 Minute wheel for alarm page 19 Please see the remarks on the following pages. Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING.” 4/27 Cal. 7T62A/7T92A/7T94A PARTS CATALOGUE The illustration refers only to Cal. 7T62A. 33 4002 711 Coil block for alarm 34 4002 700 Coil block (A) 35 4002 700 Coil block for chronograph second 36 4002 711 Coil block for chronograph minute 38 4146 710 Step rotor pages 18&19 pages 18&19 40 4146 710 Chronograph rotor for minute 37 4146 710 Alarm rotor pages 18&19 39 4146 710 Chronograph rotor for second pages 18&19 41 4450 703 Switch lever (A) page 21 42 0383 592 Setting lever page 21 43 0384 582 Yoke page 21 44 0281 580 Setting wheel page 19 45 (0351 583) ★ Winding stem ★The type of the part 46 0282 585 Clutch wheel page 19 47 4283 581 Spacer for center wheel & pinion page 10 & 21 is determined based on the case design. 48 0221 583 Center wheel & pinion page 21 49 0391 591 Train wheel setting lever page 21 50 4239 710 Rotor stator 51 4239 711 Rotor stator for chronograph second 52 4239 712 Rotor stator for alarm 53 4239 713 Rotor stator for chronograph 54 4450 701 Switch lever (B) 55 0100 586 Main plate page 22 Please see the remarks on the following pages. Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING.” 5/27 Cal. 7T62A/7T92A/7T94A PARTS CATALOGUE The illustration refers only to Cal. 7T92A. 9 0022 230 Battery clamp screw 0022 230 • Battery clamp screw (2 pcs.) 10 4225 512 Battery clamp 0022 459 11 SR927SW Battery • Circuit block cover screw (4 pcs.) page 14 page 1 12 0022 459 Circuit block cover screw 13 4457 814 Circuit block cover page 15 page 15 14 0396 580 Friction spring for second counting 15 4000 518 Circuit block pages 10, 11&16 17 4270 710 Battery connection (–) pages 10&17 18 0027 974 Pin for train wheel bridge 21 0240 580 Small second wheel 24 0701 580 Fifth wheel & pinion 19 0125 586 Train wheel bridge page 17 20 0888 582 Second counting wheel page 20 page 20 page 20 page 20 22 0241 583 Fourth wheel & pinion 23 0231 580 Third wheel & pinion 27 0261 580 Minute wheel page 20 page 20 25 0885 594 First intermediate wheel for second counting page 20 26 0885 595 Second intermediate wheel for second counting page 20 28 0950 590 Intermediate wheel for second counting (1/20) page 20 29 0902 580 Second counting wheel (1/20) page 20 page 20 30 0950 590 Intermediate minute counting wheel 31 0270 582 Minute counting wheel page 20 page 20 32 0261 582 Intermediate wheel for hour counting Please see the remarks on the following pages. Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING.” 6/27
